/*
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 * 
 * Author: Adam Dunkels <adam@sics.se>
 *
 */
#ifndef __LWIP_TCPIP_H__
#define __LWIP_TCPIP_H__

#include "lwip/opt.h"

#if !NO_SYS			/* don't build if not configured for use in lwipopts.h */

#include "lwip/api_msg.h"
#include "lwip/netifapi.h"
#include "lwip/pbuf.h"
#include "lwip/api.h"
#include "lwip/sys.h"

#ifdef __cplusplus
extern "C"
{
#endif

#if LWIP_TCPIP_CORE_LOCKING
/** The global semaphore to lock the stack. */
  extern sys_sem_t lock_tcpip_core;
#define LOCK_TCPIP_CORE()     sys_sem_wait(lock_tcpip_core)
#define UNLOCK_TCPIP_CORE()   sys_sem_signal(lock_tcpip_core)
#define TCPIP_APIMSG(m)       tcpip_apimsg_lock(m)
#define TCPIP_APIMSG_ACK(m)
#define TCPIP_NETIFAPI(m)     tcpip_netifapi_lock(m)
#define TCPIP_NETIFAPI_ACK(m)
#else
#define LOCK_TCPIP_CORE()
#define UNLOCK_TCPIP_CORE()
#define TCPIP_APIMSG(m)       tcpip_apimsg(m)
#define TCPIP_APIMSG_ACK(m)   sys_sem_signal(m->conn->op_completed)
#define TCPIP_NETIFAPI(m)     tcpip_netifapi(m)
#define TCPIP_NETIFAPI_ACK(m) sys_sem_signal(m->sem)
#endif				/* LWIP_TCPIP_CORE_LOCKING */

  void tcpip_init (void (*tcpip_init_done) (void *), void *arg);

#if LWIP_NETCONN
  err_t tcpip_apimsg (struct api_msg *apimsg);
#if LWIP_TCPIP_CORE_LOCKING
  err_t tcpip_apimsg_lock (struct api_msg *apimsg);
#endif				/* LWIP_TCPIP_CORE_LOCKING */
#endif				/* LWIP_NETCONN */

  err_t tcpip_input (struct pbuf *p, struct netif *inp);

#if LWIP_NETIF_API
  err_t tcpip_netifapi (struct netifapi_msg *netifapimsg);
#if LWIP_TCPIP_CORE_LOCKING
  err_t tcpip_netifapi_lock (struct netifapi_msg *netifapimsg);
#endif				/* LWIP_TCPIP_CORE_LOCKING */
#endif				/* LWIP_NETIF_API */

  err_t tcpip_callback_with_block (void (*f) (void *ctx), void *ctx,
				   u8_t block);
#define tcpip_callback(f,ctx) tcpip_callback_with_block(f,ctx,1)

  err_t tcpip_timeout (u32_t msecs, sys_timeout_handler h, void *arg);
#define tcpip_untimeout(h, arg) tcpip_timeout(0xffffffff, h, arg)

  enum tcpip_msg_type
  {
#if LWIP_NETCONN
    TCPIP_MSG_API,
#endif				/* LWIP_NETCONN */
    TCPIP_MSG_INPKT,
#if LWIP_NETIF_API
    TCPIP_MSG_NETIFAPI,
#endif				/* LWIP_NETIF_API */
    TCPIP_MSG_CALLBACK,
    TCPIP_MSG_TIMEOUT
  };

  struct tcpip_msg
  {
    enum tcpip_msg_type type;
    sys_sem_t *sem;
    union
    {
#if LWIP_NETCONN
      struct api_msg *apimsg;
#endif				/* LWIP_NETCONN */
#if LWIP_NETIF_API
      struct netifapi_msg *netifapimsg;
#endif				/* LWIP_NETIF_API */
      struct
      {
	struct pbuf *p;
	struct netif *netif;
      } inp;
      struct
      {
	void (*f) (void *ctx);
	void *ctx;
      } cb;
      struct
      {
	u32_t msecs;
	sys_timeout_handler h;
	void *arg;
      } tmo;
    } msg;
  };

#ifdef __cplusplus
}
#endif

#endif				/* !NO_SYS */

#endif				/* __LWIP_TCPIP_H__ */
